Find the exact value of the expression, if possible. Do not use a calculator.
-$\cos \left( \cos ^ { - 1 } 0.5 \right)$
A) $0.5$
B) $2.6$
C) $3.6$
D) $0.9$

Name: Find the exact value of the expression, if possible. Do not use a calculator. -$\cos \left( \cos ^ { - 1 } 0.5 \right)$ A) $0.5$ B) $2.6$ C) $3.6$ D) $0.9$
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Question

Quizplus · Accepted Answer

The expression $\cos(\cos^{-1}(0.5))$ simplifies directly to $0.5$, because $\cos^{-1}(0.5)$ asks for the angle whose cosine is $0.5$, and applying $\cos$ to that angle returns $0.5$.

Find the Exact Value of the Expression, If Possible cos⁡(cos⁡−10.5)\cos \left( \cos ^ { - 1 } 0.5 \right)cos(cos−10.5)

Find the Exact Value of the Expression, If Possible $\cos \left( \cos ^ { - 1 } 0.5 \right)$